View of New and poorly known ferns from the Santa Clara Formation, Late Triassic, Sonora, NW Mexico; III Marattiales. Tranquilia Herbst—a Panamerican dimorphic genus | Revista Mexicana de Ciencias Geológicas

← New and poorly known ferns from the Santa Clara Formation, Late Triassic, Sonora, NW Mexico; III Marattiales. Tranquilia Herbst—a Panamerican dimorphic genus